GLP-1 medications can significantly change how people experience hunger and satiety. For many, the reduction in constant food-related thoughts feels like a relief—sometimes the first quiet moment in years. This physiological shift can make behavior change feel newly possible. But medication does not provide structure. It does not decide when people move, how they manage stress, or which behaviors become routine. From a psychological perspective, GLP-1s create opportunity, not organization. Whether that opportunity leads to lasting change depends on the conditions surrounding daily behavior. Friction and the Cost of Action Behavioral science consistently shows that people repeat behaviors that feel easy to initiate. When an action requires planning, preparation, or sustained self-control, adherence declines—even when motivation is high. Many health behaviors fail not because people lack discipline, but because the environments in which they are attempted create friction. Settings that demand performance, tracking, or comparison increase the perceived cost of action. In contrast, environments that lower barriers—through simplicity, accessibility, or familiarity—support repetition. Reducing friction is often more effective than increasing motivation. Attention, Fatigue, and Self-Regulation …